关键差异 - 百分比屈服vsPercent Recovery
产量百分比是从化学物质获得的化合物的量合成相对于理论上的预期量的反应。这是一个百分比值。它用于确定化学反应的效率。恢复百分比是经常用于有机化学的术语重结晶processes. The percent recovery is the amount of pure compound with respect to the impure compound obtained from the chemical synthesis. The关键区别收益百分比和恢复百分比之间percent yield is calculated as a ratio between actual yield and theoretical yield whereas percent recovery is calculated as the ratio between the pure compound and initial compound。
CONTENTS
1。概述和关键差异
2。百分比百分比
3。What is Percent Recovery
4。Similarities Between Percent Yield and Percent Recovery
5.Side by Side Comparison – Percent Yield vs Percent Recovery in Tabular Form
6.Summary
百分比百分比?
产量百分比是实际产率百分比与从化学合成获得的最终产物的理论收益率之间的比率。通常,由于实验错误,例如不完整的化学反应,产品恢复等等等实验误差,实际产率小于理论产量的收率。%。
Percent Yield Calculation
Equation
用于计算百分比的方程如下。
Percent Yield = (Actual yield/ Theoretical yield) x 100%
有时,百分比的价值超过100%。这意味着该产品的量超过理论计算中的预期。这是可能的,因为在同一反应混合物中可能还有其他一些化学反应产生相同的产物。但是,这也可能是由于存在杂质。
让我们以一个例子来了解百分比的计算。
Ex: When CaCO3(16.0 g)加热到热分解,7.54 g of CaO was obtained.
理论产量:
卡科3→ CaO + CO2
Stoichiometry between CaCO3CAO是1:1。因此,一个moleofcalcium carbonateshould give 1 mole of calcium oxide. Themolar mass碳酸钙为100 g/mol,氧化钙的摩尔质量为56 g/mol。
如果燃烧100克Caco3,则将提供56 g CaO。但是在这项实验中,燃烧了16.0 g。那么应给出的CAO数量是
理论产量=(56 g /100 g)x 16 g = 8.96 g
然后可以计算出百分比如下。
Percent yield = (7.54 g / 8.96 g) x 100% = 84.16 %
What is Percent Recovery?
恢复百分比是产品合成和纯化后获得的量。恢复百分比可用于确定合成反应的效率。该术语通常用于有机化学中,以确定从重结晶获得的产率。
再结晶过程是用来获得purified product. Most of the times the final product given by chemical synthesis has many impurities. Therefore, purification is an essential step in organic synthesis reactions. In the recrystallization process, the compound to be purified is mixed with a suitable hot solvent and is stirred well. Then it is allowed to cool. During this cooling, the compound is precipitated. Then the percent recovery can be calculated.
恢复计算百分比
Equation
恢复百分比=(纯化化合物 /原始化合物的量)x 100%
Here, amount of purified compound means the amount of substance formed after the recrystallization process. Amount of original compound means, the amount of impure substance taken to recrystallize.
让我们考虑一个例子,了解百分比百分比的计算。
Ex: If 14 g of copper was used in a recrystallization process and the amount of copper recovered at the end of the process is 12 g,
Percent recovery = (12 g/14 g) x 100% = 85.71 %
收益百分比和恢复百分比之间的相似性是什么?
- 收益率和百分比恢复项的百分比都是比率乘以100%的百分比。
收益百分比和恢复百分比之间有什么区别?
百分比收益率恢复百分比 |
|
产量百分比是实际产率百分比与从化学合成获得的最终产物的理论收益率之间的比率。 | 恢复百分比是产品合成和纯化后获得的量。 |
Purpose | |
产量百分比可用于确定化学合成的效率。 | Percent recovery is used to determine the amount of pure compound present in the final product of chemical synthesis. |
Equation for Calculation |
|
收益率百分比被计算为实际产率和理论收益率之间的比率。 Percent Yield = (Actual yield/ Theoretical yield) x 100% |
恢复百分比被计算为纯化合物和初始化合物之间的比率。 恢复百分比=(纯化化合物 /原始化合物的量)x 100% |
摘要 - 百分比屈服vsPercent Recovery
收益率和恢复百分比是两个用来指示从化学合成反应获得的最终产物的数量或纯度的术语。收益率百分比和恢复百分比之间的差异是,收益百分比被计算为实际收益率和理论收益率之间的比率,而恢复百分比的计算为纯化合物和初始化合物之间的比率。
参考:
1。“How to Calculate Percent Recovery.” ScienceStruck.在这里可用
2。Helmenstine, Anne Marie, D. “Percent Yield Definition and Formula.” ThoughtCo, Jan. 21, 2018.在这里可用
图片提供:
1.’碳酸盐岩石的岩石 - 自己的工作,(CC BY-SA 3.0)通过下议院维基梅迪亚
2。’Cinnamic acid’By Aleksander Sobolewski via Wikimedia Commons,(CC BY-SA 4.0)通过下议院维基梅迪亚
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